Jamie Neal and Garrett Hand are heading upstream in a small boat on a jungle river, said Jose Luis Silva, Peru's minister of tourism and commerce.

CNN: STORY HIGHLIGHTS

When the couple was spotted traveling in a small boat on a remote jungle river, Peruvian officials said they were clearly enjoying their trip and weren't aware that their families were looking for them.

CNN: STORY HIGHLIGHTS

Excursions include diving, sailing, kayaking, deep-sea fishing, swimming with dolphins, championship golf, windsurfing, eco-tours, a trip to the Contoy Island bird sanctuary, guided nature walks, jungle river trips, fishing and day trips to the ancient Maya ruins in the area.

FORBES: Travel to Mexico's Riviera Maya is Safe and Worth Every Penny

Deep in the jungle of the Congo River basin, far from the eyes of most of the world, a largely forgotten African war is being fought.

BBC: Congo Brazzaville's hidden war

Rounding a bend, de Souza motioned the boatman to slow down as the river became narrow, the jungle thick and verdant.

BBC: Brazil��s land of the jaguar

There are few experiences more thrilling than tracking and capturing a wild crocodile in the dead of night, on a river in the heart of the Central American jungle.

BBC: Tagging crocodiles in Belize